/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Lesser General Public
    License as published by the Free Software Foundation; either
    version 2.1 of the License, or (at your option) any later version.

    This library is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    Lesser General Public License for more details.

    You should have received a copy of the GNU Lesser General Public
    License along with this library; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

    Sam Lantinga
    slouken@libsdl.org
*/

/** @file SDL_stdinc.h
 *  This is a general header that includes C language support
 */

#ifndef _SDL_stdinc_h
#define _SDL_stdinc_h

#include "SDL_config.h"


#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_STDIO_H
#include <stdio.h>
#endif
#if defined(STDC_HEADERS)
# include <stdlib.h>
# include <stddef.h>
# include <stdarg.h>
#else
# if defined(HAVE_STDLIB_H)
#  include <stdlib.h>
# elif defined(HAVE_MALLOC_H)
#  include <malloc.h>
# endif
# if defined(HAVE_STDDEF_H)
#  include <stddef.h>
# endif
# if defined(HAVE_STDARG_H)
#  include <stdarg.h>
# endif
#endif
#ifdef HAVE_STRING_H
# if !defined(STDC_HEADERS) && defined(HAVE_MEMORY_H)
#  include <memory.h>
# endif
# include <string.h>
#endif
#ifdef HAVE_STRINGS_H
# include <strings.h>
#endif
#if defined(HAVE_INTTYPES_H)
# include <inttypes.h>
#elif defined(HAVE_STDINT_H)
# include <stdint.h>
#endif
#ifdef HAVE_CTYPE_H
# include <ctype.h>
#endif
#if defined(HAVE_ICONV) && defined(HAVE_ICONV_H)
# include <iconv.h>
#endif

/** The number of elements in an array */
#define SDL_arraysize(array)    (sizeof(array)/sizeof(array[0]))
#define SDL_TABLESIZE(table)    SDL_arraysize(table)

/* Use proper C++ casts when compiled as C++ to be compatible with the option
 -Wold-style-cast of GCC (and -Werror=old-style-cast in GCC 4.2 and above. */
#ifdef __cplusplus
#define SDL_reinterpret_cast(type, expression) reinterpret_cast<type>(expression)
#define SDL_static_cast(type, expression) static_cast<type>(expression)
#else
#define SDL_reinterpret_cast(type, expression) ((type)(expression))
#define SDL_static_cast(type, expression) ((type)(expression))
#endif

/** @name Basic data types */
/*@{*/
typedef enum {
    SDL_FALSE = 0,
    SDL_TRUE  = 1
} SDL_bool;

typedef int8_t      Sint8;
typedef uint8_t     Uint8;
typedef int16_t     Sint16;
typedef uint16_t    Uint16;
typedef int32_t     Sint32;
typedef uint32_t    Uint32;

#ifdef SDL_HAS_64BIT_TYPE
typedef int64_t     Sint64;
#ifndef SYMBIAN32_GCCE
typedef uint64_t    Uint64;
#endif
#else
/* This is really just a hack to prevent the compiler from complaining */
typedef struct {
    Uint32 hi;
    Uint32 lo;
} Uint64, Sint64;
#endif

/*@}*/

/** @name Make sure the types really have the right sizes */
/*@{*/
#define SDL_COMPILE_TIME_ASSERT(name, x)               \
    typedef int SDL_dummy_ ## name[(x) * 2 - 1]

SDL_COMPILE_TIME_ASSERT(uint8, sizeof(Uint8) == 1);
SDL_COMPILE_TIME_ASSERT(sint8, sizeof(Sint8) == 1);
SDL_COMPILE_TIME_ASSERT(uint16, sizeof(Uint16) == 2);
SDL_COMPILE_TIME_ASSERT(sint16, sizeof(Sint16) == 2);
SDL_COMPILE_TIME_ASSERT(uint32, sizeof(Uint32) == 4);
SDL_COMPILE_TIME_ASSERT(sint32, sizeof(Sint32) == 4);
SDL_COMPILE_TIME_ASSERT(uint64, sizeof(Uint64) == 8);
SDL_COMPILE_TIME_ASSERT(sint64, sizeof(Sint64) == 8);
/*@}*/

/** @name Enum Size Check
 *  Check to make sure enums are the size of ints, for structure packing.
 *  For both Watcom C/C++ and Borland C/C++ the compiler option that makes
 *  enums having the size of an int must be enabled.
 *  This is "-b" for Borland C/C++ and "-ei" for Watcom C/C++ (v11).
 */
/* Enable enums always int in CodeWarrior (for MPW use "-enum int") */
#ifdef __MWERKS__
#pragma enumsalwaysint on
#endif

typedef enum {
    DUMMY_ENUM_VALUE
} SDL_DUMMY_ENUM;

#ifndef __NDS__
SDL_COMPILE_TIME_ASSERT(enum, sizeof(SDL_DUMMY_ENUM) == sizeof(int));
#endif
/*@}*/

#include "begin_code.h"
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif

#ifdef HAVE_MALLOC
#define SDL_malloc  malloc
#else
    extern DECLSPEC void *SDLCALL SDL_malloc(size_t size);
#endif

#ifdef HAVE_CALLOC
#define SDL_calloc  calloc
#else
    extern DECLSPEC void *SDLCALL SDL_calloc(size_t nmemb, size_t size);
#endif

#ifdef HAVE_REALLOC
#define SDL_realloc realloc
#else
    extern DECLSPEC void *SDLCALL SDL_realloc(void *mem, size_t size);
#endif

#ifdef HAVE_FREE
#define SDL_free    free
#else
    extern DECLSPEC void SDLCALL SDL_free(void *mem);
#endif

#if defined(HAVE_ALLOCA) && !defined(alloca)
# if defined(HAVE_ALLOCA_H)
#  include <alloca.h>
# elif defined(__GNUC__)
#  define alloca __builtin_alloca
# elif defined(_MSC_VER)
#  include <malloc.h>
#  define alloca _alloca
# elif defined(__WATCOMC__)
#  include <malloc.h>
# elif defined(__BORLANDC__)
#  include <malloc.h>
# elif defined(__DMC__)
#  include <stdlib.h>
# elif defined(__AIX__)
#pragma alloca
# elif defined(__MRC__)
    void *alloca(unsigned);
# else
    char *alloca();
# endif
#endif
#ifdef HAVE_ALLOCA
#define SDL_stack_alloc(type, count)    (type*)alloca(sizeof(type)*(count))
#define SDL_stack_free(data)
#else
#define SDL_stack_alloc(type, count)    (type*)SDL_malloc(sizeof(type)*(count))
#define SDL_stack_free(data)            SDL_free(data)
#endif

#ifdef HAVE_GETENV
#define SDL_getenv  getenv
#else
    extern DECLSPEC char *SDLCALL SDL_getenv(const char *name);
#endif

#ifdef HAVE_PUTENV
#define SDL_putenv  putenv
#else
    extern DECLSPEC int SDLCALL SDL_putenv(const char *variable);
#endif

#ifdef HAVE_QSORT
#define SDL_qsort   qsort
#else
    extern DECLSPEC void SDLCALL SDL_qsort(void *base, size_t nmemb, size_t size,
                                           int (*compare)(const void *, const void *));
#endif

#ifdef HAVE_ABS
#define SDL_abs     abs
#else
#define SDL_abs(X)  ((X) < 0 ? -(X) : (X))
#endif

#define SDL_min(x, y)   (((x) < (y)) ? (x) : (y))
#define SDL_max(x, y)   (((x) > (y)) ? (x) : (y))

#ifdef HAVE_CTYPE_H
#define SDL_isdigit(X)  isdigit(X)
#define SDL_isspace(X)  isspace(X)
#define SDL_toupper(X)  toupper(X)
#define SDL_tolower(X)  tolower(X)
#else
#define SDL_isdigit(X)  (((X) >= '0') && ((X) <= '9'))
#define SDL_isspace(X)  (((X) == ' ') || ((X) == '\t') || ((X) == '\r') || ((X) == '\n'))
#define SDL_toupper(X)  (((X) >= 'a') && ((X) <= 'z') ? ('A'+((X)-'a')) : (X))
#define SDL_tolower(X)  (((X) >= 'A') && ((X) <= 'Z') ? ('a'+((X)-'A')) : (X))
#endif

#ifdef HAVE_MEMSET
#define SDL_memset      memset
#else
    extern DECLSPEC void *SDLCALL SDL_memset(void *dst, int c, size_t len);
#endif

#if defined(__GNUC__) && defined(i386)
#define SDL_memset4(dst, val, len)              \
    do {                                \
        int u0, u1, u2;                     \
        __asm__ __volatile__ (                  \
                                                "cld\n\t"                   \
                                                "rep ; stosl\n\t"               \
                                                : "=&D" (u0), "=&a" (u1), "=&c" (u2)        \
                                                : "0" (dst), "1" (val), "2" (SDL_static_cast(Uint32, len))  \
                                                : "memory" );                   \
    } while(0)
#endif
#ifndef SDL_memset4
#define SDL_memset4(dst, val, len)      \
    do {                        \
        unsigned _count = (len);        \
        unsigned _n = (_count + 3) / 4;     \
        Uint32 *_p = SDL_static_cast(Uint32 *, dst);    \
        Uint32 _val = (val);            \
        if (len == 0) break;            \
        switch (_count % 4) {           \
        case 0: do {    *_p++ = _val;       \
            case 3:         *_p++ = _val;       \
            case 2:         *_p++ = _val;       \
            case 1:         *_p++ = _val;       \
            } while ( --_n );       \
        }                   \
    } while(0)
#endif

    /* We can count on memcpy existing on Mac OS X and being well-tuned. */
#if defined(__MACH__) && defined(__APPLE__)
#define SDL_memcpy(dst, src, len) memcpy(dst, src, len)
#elif defined(__GNUC__) && defined(i386)
#define SDL_memcpy(dst, src, len)                     \
    do {                                      \
        int u0, u1, u2;                           \
        __asm__ __volatile__ (                        \
                                                      "cld\n\t"                         \
                                                      "rep ; movsl\n\t"                     \
                                                      "testb $2,%b4\n\t"                    \
                                                      "je 1f\n\t"                       \
                                                      "movsw\n"                         \
                                                      "1:\ttestb $1,%b4\n\t"                    \
                                                      "je 2f\n\t"                       \
                                                      "movsb\n"                         \
                                                      "2:"                              \
                                                      : "=&c" (u0), "=&D" (u1), "=&S" (u2)              \
                                                      : "0" (SDL_static_cast(unsigned, len)/4), "q" (len), "1" (dst),"2" (src) \
                                                      : "memory" );                         \
    } while(0)
#endif
#ifndef SDL_memcpy
#ifdef HAVE_MEMCPY
#define SDL_memcpy      memcpy
#elif defined(HAVE_BCOPY)
#define SDL_memcpy(d, s, n) bcopy((s), (d), (n))
#else
    extern DECLSPEC void *SDLCALL SDL_memcpy(void *dst, const void *src, size_t len);
#endif
#endif

    /* We can count on memcpy existing on Mac OS X and being well-tuned. */
#if defined(__MACH__) && defined(__APPLE__)
#define SDL_memcpy4(dst, src, len) memcpy(dst, src, (len)*4)
#elif defined(__GNUC__) && defined(i386)
#define SDL_memcpy4(dst, src, len)              \
    do {                                \
        int ecx, edi, esi;                  \
        __asm__ __volatile__ (                  \
                                                "cld\n\t"                   \
                                                "rep ; movsl"                   \
                                                : "=&c" (ecx), "=&D" (edi), "=&S" (esi)     \
                                                : "0" (SDL_static_cast(unsigned, len)), "1" (dst), "2" (src)    \
                                                : "memory" );                   \
    } while(0)
#endif
#ifndef SDL_memcpy4
#define SDL_memcpy4(dst, src, len)  SDL_memcpy(dst, src, (len) << 2)
#endif

#if defined(__GNUC__) && defined(i386)
#define SDL_revcpy(dst, src, len)           \
    do {                            \
        int u0, u1, u2;                 \
        char *dstp = SDL_static_cast(char *, dst);  \
        char *srcp = SDL_static_cast(char *, src);  \
        int n = (len);                  \
        if ( n >= 4 ) {                 \
            __asm__ __volatile__ (              \
                                                "std\n\t"               \
                                                "rep ; movsl\n\t"           \
                                                "cld\n\t"               \
                                                : "=&c" (u0), "=&D" (u1), "=&S" (u2)    \
                                                : "0" (n >> 2),             \
                                                "1" (dstp+(n-4)), "2" (srcp+(n-4))    \
                                                : "memory" );               \
        }                       \
        switch (n & 3) {                \
        case 3: dstp[2] = srcp[2];      \
        case 2: dstp[1] = srcp[1];      \
        case 1: dstp[0] = srcp[0];      \
            break;              \
        default:                \
            break;              \
        }                       \
    } while(0)
#endif
#ifndef SDL_revcpy
    extern DECLSPEC void *SDLCALL SDL_revcpy(void *dst, const void *src, size_t len);
#endif

#ifdef HAVE_MEMMOVE
#define SDL_memmove     memmove
#elif defined(HAVE_BCOPY)
#define SDL_memmove(d, s, n)    bcopy((s), (d), (n))
#else
#define SDL_memmove(dst, src, len)          \
    do {                            \
        if ( dst < src ) {              \
            SDL_memcpy(dst, src, len);      \
        } else {                    \
            SDL_revcpy(dst, src, len);      \
        }                       \
    } while(0)
#endif

#ifdef HAVE_MEMCMP
#define SDL_memcmp      memcmp
#else
    extern DECLSPEC int SDLCALL SDL_memcmp(const void *s1, const void *s2, size_t len);
#endif

#ifdef HAVE_STRLEN
#define SDL_strlen      strlen
#else
    extern DECLSPEC size_t SDLCALL SDL_strlen(const char *string);
#endif

#ifdef HAVE_STRLCPY
#define SDL_strlcpy     strlcpy
#else
    extern DECLSPEC size_t SDLCALL SDL_strlcpy(char *dst, const char *src, size_t maxlen);
#endif

#ifdef HAVE_STRLCAT
#define SDL_strlcat    strlcat
#else
    extern DECLSPEC size_t SDLCALL SDL_strlcat(char *dst, const char *src, size_t maxlen);
#endif

#ifdef HAVE_STRDUP
#define SDL_strdup     strdup
#else
    extern DECLSPEC char *SDLCALL SDL_strdup(const char *string);
#endif

#ifdef HAVE__STRREV
#define SDL_strrev      _strrev
#else
    extern DECLSPEC char *SDLCALL SDL_strrev(char *string);
#endif

#ifdef HAVE__STRUPR
#define SDL_strupr      _strupr
#else
    extern DECLSPEC char *SDLCALL SDL_strupr(char *string);
#endif

#ifdef HAVE__STRLWR
#define SDL_strlwr      _strlwr
#else
    extern DECLSPEC char *SDLCALL SDL_strlwr(char *string);
#endif

#ifdef HAVE_STRCHR
#define SDL_strchr      strchr
#elif defined(HAVE_INDEX)
#define SDL_strchr      index
#else
    extern DECLSPEC char *SDLCALL SDL_strchr(const char *string, int c);
#endif

#ifdef HAVE_STRRCHR
#define SDL_strrchr     strrchr
#elif defined(HAVE_RINDEX)
#define SDL_strrchr     rindex
#else
    extern DECLSPEC char *SDLCALL SDL_strrchr(const char *string, int c);
#endif

#ifdef HAVE_STRSTR
#define SDL_strstr      strstr
#else
    extern DECLSPEC char *SDLCALL SDL_strstr(const char *haystack, const char *needle);
#endif

#ifdef HAVE_ITOA
#define SDL_itoa        itoa
#else
#define SDL_itoa(value, string, radix)  SDL_ltoa((long)value, string, radix)
#endif

#ifdef HAVE__LTOA
#define SDL_ltoa        _ltoa
#else
    extern DECLSPEC char *SDLCALL SDL_ltoa(long value, char *string, int radix);
#endif

#ifdef HAVE__UITOA
#define SDL_uitoa       _uitoa
#else
#define SDL_uitoa(value, string, radix) SDL_ultoa((long)value, string, radix)
#endif

#ifdef HAVE__ULTOA
#define SDL_ultoa       _ultoa
#else
    extern DECLSPEC char *SDLCALL SDL_ultoa(unsigned long value, char *string, int radix);
#endif

#ifdef HAVE_STRTOL
#define SDL_strtol      strtol
#else
    extern DECLSPEC long SDLCALL SDL_strtol(const char *string, char **endp, int base);
#endif

#ifdef HAVE_STRTOUL
#define SDL_strtoul      strtoul
#else
    extern DECLSPEC unsigned long SDLCALL SDL_strtoul(const char *string, char **endp, int base);
#endif

#ifdef SDL_HAS_64BIT_TYPE

#ifdef HAVE__I64TOA
#define SDL_lltoa       _i64toa
#else
    extern DECLSPEC char *SDLCALL SDL_lltoa(Sint64 value, char *string, int radix);
#endif

#ifdef HAVE__UI64TOA
#define SDL_ulltoa      _ui64toa
#else
    extern DECLSPEC char *SDLCALL SDL_ulltoa(Uint64 value, char *string, int radix);
#endif

#ifdef HAVE_STRTOLL
#define SDL_strtoll     strtoll
#else
    extern DECLSPEC Sint64 SDLCALL SDL_strtoll(const char *string, char **endp, int base);
#endif

#ifdef HAVE_STRTOULL
#define SDL_strtoull     strtoull
#else
    extern DECLSPEC Uint64 SDLCALL SDL_strtoull(const char *string, char **endp, int base);
#endif

#endif /* SDL_HAS_64BIT_TYPE */

#ifdef HAVE_STRTOD
#define SDL_strtod      strtod
#else
    extern DECLSPEC double SDLCALL SDL_strtod(const char *string, char **endp);
#endif

#ifdef HAVE_ATOI
#define SDL_atoi        atoi
#else
#define SDL_atoi(X)     SDL_strtol(X, NULL, 0)
#endif

#ifdef HAVE_ATOF
#define SDL_atof        atof
#else
#define SDL_atof(X)     SDL_strtod(X, NULL)
#endif

#ifdef HAVE_STRCMP
#define SDL_strcmp      strcmp
#else
    extern DECLSPEC int SDLCALL SDL_strcmp(const char *str1, const char *str2);
#endif

#ifdef HAVE_STRNCMP
#define SDL_strncmp     strncmp
#else
    extern DECLSPEC int SDLCALL SDL_strncmp(const char *str1, const char *str2, size_t maxlen);
#endif

#ifdef HAVE_STRCASECMP
#define SDL_strcasecmp  strcasecmp
#elif defined(HAVE__STRICMP)
#define SDL_strcasecmp  _stricmp
#else
    extern DECLSPEC int SDLCALL SDL_strcasecmp(const char *str1, const char *str2);
#endif

#ifdef HAVE_STRNCASECMP
#define SDL_strncasecmp strncasecmp
#elif defined(HAVE__STRNICMP)
#define SDL_strncasecmp _strnicmp
#else
    extern DECLSPEC int SDLCALL SDL_strncasecmp(const char *str1, const char *str2, size_t maxlen);
#endif

#ifdef HAVE_SSCANF
#define SDL_sscanf      sscanf
#else
    extern DECLSPEC int SDLCALL SDL_sscanf(const char *text, const char *fmt, ...);
#endif

#ifdef HAVE_SNPRINTF
#define SDL_snprintf    snprintf
#else
    extern DECLSPEC int SDLCALL SDL_snprintf(char *text, size_t maxlen, const char *fmt, ...);
#endif

#ifdef HAVE_VSNPRINTF
#define SDL_vsnprintf   vsnprintf
#else
    extern DECLSPEC int SDLCALL SDL_vsnprintf(char *text, size_t maxlen, const char *fmt, va_list ap);
#endif

    /** @name SDL_ICONV Error Codes
     *  The SDL implementation of iconv() returns these error codes
     */
    /*@{*/
#define SDL_ICONV_ERROR     (size_t)-1
#define SDL_ICONV_E2BIG     (size_t)-2
#define SDL_ICONV_EILSEQ    (size_t)-3
#define SDL_ICONV_EINVAL    (size_t)-4
    /*@}*/

#if defined(HAVE_ICONV) && defined(HAVE_ICONV_H)
#define SDL_iconv_t     iconv_t
#define SDL_iconv_open  iconv_open
#define SDL_iconv_close iconv_close
#else
    typedef struct _SDL_iconv_t *SDL_iconv_t;
    extern DECLSPEC SDL_iconv_t SDLCALL SDL_iconv_open(const char *tocode, const char *fromcode);
    extern DECLSPEC int SDLCALL SDL_iconv_close(SDL_iconv_t cd);
#endif
    extern DECLSPEC size_t SDLCALL SDL_iconv(SDL_iconv_t cd, const char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft);
    /** This function converts a string between encodings in one pass, returning a
     *  string that must be freed with SDL_free() or NULL on error.
     */
    extern DECLSPEC char *SDLCALL SDL_iconv_string(const char *tocode, const char *fromcode, const char *inbuf, size_t inbytesleft);
#define SDL_iconv_utf8_locale(S)    SDL_iconv_string("", "UTF-8", S, SDL_strlen(S)+1)
#define SDL_iconv_utf8_ucs2(S)      (Uint16 *)SDL_iconv_string("UCS-2", "UTF-8", S, SDL_strlen(S)+1)
#define SDL_iconv_utf8_ucs4(S)      (Uint32 *)SDL_iconv_string("UCS-4", "UTF-8", S, SDL_strlen(S)+1)

    /* Ends C function definitions when using C++ */
#ifdef __cplusplus
}
#endif
#include "close_code.h"

#endif /* _SDL_stdinc_h */
